Patent US3911969A successfully refreshed from Google Patents.
US3911969A
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US
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Stop motion device for weft in the form of a single thread or several threads
Assignee: Shaw Intellectual Property Holdings Inc
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Filing: 1973-11-06
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Granted: 1975-10-14
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Expires: 1993-11-06
Abstract
Abstract Device with one thread responsive channel for each thread of a weft, each of said channels having means for providing an electrical signal in the presence of a thread, in which a channel used for a single-thread weft has means for providing an electrical signal in each of the channels used for a pluralthread weft in the presence of a thread whereby the function of a loom will be interrupted in the absence of a signal in any one of the channels.
Inventors
- 👤 Sten Ake Olaus Rydborn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:04
CPC Classifications
D; D03; D03D; D03D51/00; D03D51/18; D03D51/34
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
109 words
Weft stop motion device for interrupting the function of a loom upon rupture of one thread in a first weft formed of a plurality of threads or upon rupture of a thread of a second weft formed of a single thread, comprising a circuit having individual channel means for each of said threads, signal transmitter means in each of said individual channel means for converting the presence of said thread into an electric signal, said individual channel means for the single thread of said second weft being arranged to provide said electric signal in each of said individual channel means for each of the threads of said first weft.
Claim 2
Dependent Claim
109 words
Weft stop motion device for interrupting the function of a loom upon rupture of one thread in a first weft formed of a plurality of threads or upon rupture of a thread of a second weft formed of a single thread, comprising a circuit having individual channel means for each of said threads, signal transmitter means in each of said individual channel means for converting the presence of said thread into an electric signal, said individual channel means for the single thread of said second weft being arranged to provide said electric signal in each of said individual channel means for each of the threads of said first weft.
Claim 3
Dependent Claim
26 words
A device as claimed in claim 1, wherein the signal transmitter means are piezoelectrical transmitters, and wherein all signal transmitter means are placed side by side.
Claim 4
Dependent Claim
83 words
A device as claimed in claim 1, wherein said individual channel means includes a circuit means of high input impedance and low output impedance, the inputs of said circuit means of each of said individual channel means of said first weft formed of a plurality of threads being connected to each other and the output of said circuit means of said individual channel means of said second weft formed of a single thread being connected to said connected inputs for the first weft.
Claim 5
Dependent Claim
21 words
A device as claimed in claim 3, wherein the circuit means consists of identical transistor amplifier stages connected as emitter followers.
References Cited (Backward Citations)
US3438021A
Cited
US3467149A
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US3526254A
Cited
US3611342A
Cited
US3676769A
Cited
US3802469A
Cited
US3688958A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |